Friction-gear.



I s. HASELHNE.

A FRICTION GEAR.

WITNESSES.

APPLICATION FILED APR. 5. 191.5.

Patented Oct. 31, 1916.

2 SHEETS-SHEET'I.

W 'Z9 3513- J4 ATTORNEX'.

-STACY B.. IIASELTINE, or CHICAGO, ILLINOIS, AssIGNon To WILLIAM n. ivIINEIt, or

.v H1crimini,Nav/YoanpA i .f which the following is a full, cle'arnconcise,- and'exact description, reference being had I'-tof the accompanying drawings, forming a Athefriction elements so arranged as to per- FRICTIQN-GEAR.

' Be it known that I, STA'GY IIASELTINE, afcitizen of the United States, residing at Chicago, in' the county of Cook' and State of Illinois,- have inventeda certain new and .useful Improvement in Friction-Gears, of

part of this specification. .3 .i This invention relates friction gears. l

jAn object of the' invention is to provide a friction "gear for draft Ariggirigs of. high capacity; strong construction, simple in arrangement, efficient in operation, and having mito'f certain release and avoidance ofall danger-of sticking. p v o "i'The invention' furthermore consists the improvn'ients :of the f parts and kdevices-and 'i nffhe .novel combinations of the Parts and devices, as herein shown, describedv or claimed. v. In the drawingforming' a part of. this specification, Figure 1 is a vertical sectional `v vi'ew'ffa friction draft rigging showing my improvementsy in connection therewith. Fig.

'.2---i's` an enlarged detailsectional view of a portion `of thefront end of the friction gear `proper and illustrating. the arrangement of i friction devices em-ployed,.the parts being in 85' tl'i'eijparts'appear with the pressure still apfullrelease. Fig. 3 is a view similar to Fig.

plied to the gear. Fig'. iis view'similar to Figj' but showing the actuation `of soine of "the ,wedging members as the' same occurs immediately upon release of the. pressure against the blunt Wedge block. Fig. 5 is a front -eiid elevation of the friction gear,v with the blunt wedge removed and theconnecting boltin sectionV and Fig. G is .a transverse sectionalview taken substantially on the line `6-6 of Fig'n2. Fig.' 7 isa side'elevation of .n the "collapsible wedge.

` In said'drawing 10 denotes one ofthe centeisills to which is'secured a rear@ stop 11, front stop 12 and saddle or carrying plate 13. .The ,latter supports vthe castyoke 14 having a hooded forward end l5 keyedasf' by a coupler key I6 t'o a draw-bar 17. The foregoing parts are or may 'be ofany well known or desirable construction.A

IMounted within the yo-kegis lmy improved toi improvements in 'and' thel inturned shoulders 30 on the fric- Patented oei. 31', i916.

Application filed April 5', 1915. Serial 150.1%),351.

gear which, as shown, comprises a friction shell t8 havingv an .integral spring case 19 and rear follower 20. Confined within the 'spring case yI9 is the main spring which, as

shown, .comprises ,anV outer coil- 2l and an inner lighter coil 22, said. coils bearing at their rear ends respectively against the rear follower 2O and inwardly vextended boss 28. At their forward ends, the springs 21 and 22 bear against a Ispring follower 4plate 2i. l f Mounted within the friction' shell 18 is my improvedarrangement of -friction elenients which, as herey'shown, comprise .a

plurality yof circu'larly arranged friction shoes 2,5 vand4 a compound 'spreaderconsisting. of an outer blunt' ,"wed'ge' 26 and a col' lapsible acute wedge 27, thelatterjconsisting? of a plurality 'of wedge blocks 28--28.v Each friction shoe 25 is provided onits outer facewith a.friction surface to coperate witlrthe inner-friction surface ofthe shell in theA usual manner, and ori-its'. inner face,A each shoe 25 is provided with anv inclined ivedging face 29 and an inwardly extended rib or shoulder 30 at its inner end. The blunt .wedge 26 is provided at its innen end n with a`series of wedge faces 3l forming Vii `blunt wedge, that is, with the faces 3l form# ing a reliitiii'elav-.large orbliiiit angle with the axis of the gear. `Each ofthe wedging blocks-A28 forming the acute' wedge of the spreader, is proif'ided on vits outer face with a wedging face 32 eiigageable with the wedging face29 ofitscorresponding friction-shoe, and a blunt wedge facev 38 at its outer end coperable with its. corresponding blunt wedge face 31 ofthe 'wedge block 2G. At its inner end, each wedge block 28 is provided with a laterally extended ange or foot 34, beveled as indicated` atu onrits innerend, and normally spaced as indicated at 36 from the inner yend of the wedging shoulder formed on the friction shoe.

Interposed betweenthe wedging blocks 28 tion shoes is a supplemental orauxiliary spring 37 which, at its outer end, engages a springdfollower plate 38, the latter in turn f engaging'the outer edges of said beveled flanges or feet 34C. The spring 37is placed los under an initial compression,correspondingl .l

lto the space 36.

On their inner or substantially axial faces, the blocks 28 are provided with cut-away 'or beveled faces 39 near their outer ends, thus'` A l the blocks 28 of the acute wedge b providing a clearance between said blocks and the connecting bolt 40 (see Figs. 2 and 3). As also clearly appears from Figs. 5 and 6, clearances indicated at 41v and 42 are provided between the longitudinallsi extending lateral edges of the friction oes and blocks 28, the clearance 42 vbein provided fora purpose hereinafter speciliei` In preferable construction, as shown in Fig. 6, the f blocks 28, on their outer faces, are contoured as indicated at 43 to lfit thc friction shoes and prevent relative radial displacement of the blocks and shoes.'

The operation is as follows: Upon inward movement of the draw-bar under buff, the blunt wedge coacts with the acute wdege formed by the blocks 2 8 to spread the friction shoes outwardly a ainst the friction shell, all of the wedge bloc The full buff position of the parts is shown in Fig. 3. Now, upon release of the pressure against the blunt wedge 26, the blunt wedging lfaces 31 and 33 are readily separated, as will be understood, whereupon the s ring 37 which acts through the plate 38 wi l tilt said blocks out from their outer ends. In this way, the blocks 28 pivot about a point indicated approximately at 44 (see Fig. 4) and-also a ut a point indicated approximately at 45. This causes the acute wedge formed of the blocks 28 to colla se which immediately releases the outwa preure from the wedge or spreader against the friction shoes whereupon the main spring acting through the follower plate 24 will push the shoes outwardly to fu l release position. When the arts are in their outermost or full released) position, it is apparent that a pressure will be exerted through the blunt wedge 26 against the acute inner wedge sufficient to expand the then collapsed acute wedge until the parts assume the position shown in Figs. 1, 2 and 3. As will be understood, the clearances 42 permit of the col` lapsing of the acute wedge member of thespreader.

From the preceding description it will be seen that I have provided a gear of high capaity and one in which the release is certain. Also, during the release it is obvious that the collapse of the acute wedge member occurs by a (pivotal movement of the blocks forming sai member rather than a longitudinal outward movement of said blocks forming the acute wedge. In other words, it is not necessary for the enga 'n wedge faces 29 and 32 to shift longitudgiialy relatively to each other before the. release can occur. The blocks 28 merely swing or pivot about the friction shoes whereby the friction faces 32 recede from the friction faces 29. It is this movement and action which insures the immediate and effective release ofthe parts. i

ytions may be s acting as a single unit.

y' Pressing tion As clearly seen from-an inspection of Fig. 7, the clearances 42-42 will rinit the niembers of the collapsible werf; to approach each other at their outer ends during the releasing operation of the gear.

Althou h I have herein shown and described w at I consider the preferred einbodiment of my improvements,' yet I am aware that various changes and modificamade i'n the details of construction and departing from the spirit of the invention and all such changes and modifications are contemplated as come within t e scope of the claims appended hereto.

I claim z- 1. A friction gear for draft riggings comprising, in combination, a friction shell,

oes, a compound spreader, said spreader comprising a blunt wedge and an acute collapsible wed the acute wedge consisting of a plura ity of wedge blocks acting directly a inst the friction shoes, and a spring acting against said blocks to tilt the saine on release.

' coinfricblunt wedge and an acute collapsible w ge g acting di y against said gli 00m: mation, friction she fricprising, in .com a compound spreader includin shoes, a blunt w and an acute collapsible w and a s ring acting directly against said collspsib e wedge to collapse it on release, said spring being interposed between the inner ends of the members forming the collapsible wedge and shoulders formed on the inner Aeids o the frifctio shftties. 4. riction gear or ra riggings com-. prising a shell, friction shoes, and a comound spreader, said spreader includ' a luiit wedge and a collapsible acute w said acute wedge eonsisting of a plurality tudinal faces lapse by pivotal movement thereof.

A friction gear vfor draft coniprisin a friction sheILfriction oes, a coinpoun spreader consisting of a blunt wedge and an acute w com of a plurality of w blocks, each o saidwedge blocks being veled on its innermod: end, 'and a spri acting a inst said blOcks v011 the outer of sai beveled ends. f

follower lateengaging the outer edges Aof said beveled inner; ends of the wedge locks of wedge blocks having' their inner longi- I beveled to permit same to colin normal position of the parts, and a spring engaging said plate, the springthrough said plate tilting s'aid wedge blo'eks to collapse the acute Wedge upon release,

7, A friction gear for draft riggings coniprising, in combination, a friction shell, friction f shoes, a compound spreader, said 'spreader including a blunt wedge and ai col- ,blunt wedge en lapsible acute Wedge consistingof a plurality ofk Wedge blocks, the` Wedge blocks corresponding in number tothe number of friction shoes, each block engaging onefriction shoe only, ,und a springA acting against saidv lon'gltudinnl faces, and a* spring acting against said wedge blocks to tilt the same :ind'collapse theacute Wedge upon release.-

9. A friction gear for draft riggings co1n prising, a friction shell, friction' shoes, the latter having inner wedge faces and shoulders at their inner ends, a main spring acting against said shoes, a compound spreader of yrwhich are arranged to pivot about the wedge shoulders ofsaid shoes,v and a spring interposed. between the inner end of the acute Wedge and said shoulders on the in-` ner ends-of the friction shoes.

In Witness that I claim the foregoing lf have hereunto subscribed my name this 24th day of March, 1915.

, STACY BL HASELTINE. Witnesses:

, yCARRIE G. RANz,

' GEORGIE VIcxnRY.

,comprising an outer blunt Wedge and an `inner acute collapsible wedge, the elements 

